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| Step Down DC - DC Converter Power IC MD3221R Feature Block Diagram Small footprint Output adjustable Remote On/Off Synchronous Rectification 5V Input Input Voltage range 4.5V to 20V Maximum Output Current 3A Built_in MOSFETs for main switch and synchronous rectification Adjustable output from 0.8V to 14V with external resistors High Efficiency typ. 96% (at:Vin=5V, Vout=3.3V, Iout=1A, f=100kHz) 100kHz / 300kHz selectable switching frequency Over Current Protection Under Voltage Lockout Thermal Shut Down Remote On / Off Supply current at remote off 25 A typ. Standard Connection Diagram Pin Assignment ( LSSOP26 ) 1 2 3 4 5 6 7 8 9 10 11 12 13 26 25 24 23 22 21 20 19 18 17 16 15 14 See the marking specification for the indication on the device 7 MD3221R Absolute Maximum Ratings Item Symbol Unless otherwise specified : Ta=25C Ratings Units Recommended Operating Conditions Item Symbol Recommendation Units Electrical Characteristics Item Symbol Condition Unless otherwise specified : Ta=25C MIN TYP MAX Units 8 |
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